This is a note to let you know that I've just added the patch titled
perf sched timehist: Fix use of CPU list with summary option
to the 5.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-sched-timehist-fix-use-of-cpu-list-with-summary.patch
and it can be found in the queue-5.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit aa9eb8f321deea39734b45ca1bc6b788dfa33b13
Author: David Ahern <dsahern@xxxxxxxxxx>
Date: Mon Aug 17 11:09:42 2020 -0600
perf sched timehist: Fix use of CPU list with summary option
[ Upstream commit a74eaf1605d42391c2357a70e94e5a2c7780fea9 ]
Do not update thread stats or show idle summary unless CPU is in the
list of interest.
Fixes: c30d630d1bcfad8d ("perf sched timehist: Add support for filtering on CPU")
Signed-off-by: David Ahern <dsahern@xxxxxxxxxx>
Acked-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Link: http://lore.kernel.org/lkml/20200817170943.1486-1-dsahern@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 459e4229945e4..7b9511e59b434 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -2575,7 +2575,8 @@ static int timehist_sched_change_event(struct perf_tool *tool,
}
if (!sched->idle_hist || thread->tid == 0) {
- timehist_update_runtime_stats(tr, t, tprev);
+ if (!cpu_list || test_bit(sample->cpu, cpu_bitmap))
+ timehist_update_runtime_stats(tr, t, tprev);
if (sched->idle_hist) {
struct idle_thread_runtime *itr = (void *)tr;
@@ -2848,6 +2849,9 @@ static void timehist_print_summary(struct perf_sched *sched,
printf("\nIdle stats:\n");
for (i = 0; i < idle_max_cpu; ++i) {
+ if (cpu_list && !test_bit(i, cpu_bitmap))
+ continue;
+
t = idle_threads[i];
if (!t)
continue;
